Tute03.c

/*Exercise 3 - Repetition

Write a C program to calculate the sum of the numbers from 1 to n.
Where n is a keyboard input.

e.g.

n -> 100
sum = 1+2+3+....+ 99+100 = 5050

n -> 1-
sum = 1+2+3+...+10 = 55 */

#include <stdio.h>
int main() {
  int n, i;

printf(“Enter N number”);

scanf(“%d”,&n);

printf( “Sum of N number \n”);

i=n*(n+1)/2;

printf(“%d” ,i);

getch();
  
  return 0;
}